Answers
Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution. There are numerous ways to express how many chemicals are in a solution. The molarity of the solution is 0.16 M.
The letter M stands for molarity, one of the most often used units of concentration. The Number of moles of solute contained in 1 liter of solution is how it is defined.
The equation used to calculate the molarity of two different solutions is given as:
M₁V₁ = M₂V₂
M₁ = M₂V₂ / V₁
0.100 × 48.0 / 30 = 0.16 M
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Related Questions
does the following atomic model of a chemical reaction correctly demonstrate the law conservation of matter why or why not plz help
Answers
Answer:
ZH² + O² = ZH²O I think this may help you I don't really know how to explain
Which change in the environment led to more dark-colored peppered moths?
A. A decreased amount of burning coal to turn tree bark dark
B. An increased number of birds that eat dark-colored moths
C. A decreased number of light-colored moths on the trees
D. An increased amount of dark soot made by burning coal
Answers
Answer:
D
Explanation:
if there is more dark soot, then there is more of a chance that they won't be seen
Answer:
D
Explanation:
Peppered moths were originally more white in coloring due to needing to be able to blend into the trees. But during the industrial revolution, more smog and soot was being produced, causing the trees to become more black in color, making it harder for the moths to blend in. Therefore, resulting in the need for genetic mutations within the moths to help them better blend into their surroundings to avoid predators. (I just recently took this test too)
Hope this helps :)
What is a benefit of the
development of the cell
theory?
A. Cells have made microscopes get
better.
B. There are less biologists today
C. There is more disease on Earth now.
D. Scientists now know much more
about cells and bacteria which is a
benefit to all humans
Answers
Answer:
D
Explanation:
D because scientists study cells to know how to help people when they are sick
hope this helps (it might be wrong)
How many moles are present in 54.8 mL of mercury if the density of mercury is 13.6 g/mL?
Answers
Answer:
3.72 mol Hg
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisDensity = Mass over VolumeExplanation:
Step 1: Define
D = 13.6 g/mL
54.8 mL Hg
Step 2: Identify Conversions
Molar Mass of Hg - 200.59 g/mol
Step 3: Find
13.6 g/mL = x g / 54.8 mL
x = 745.28 g Hg
Step 4: Convert
\(745.28 \ g \ Hg(\frac{1 \ mol \ Hg}{200.59 \ g \ Hg} )\) = 3.71544 mol Hg
Step 5: Check
We are given 3 sig figs. Follow sig fig rules and round.
3.71544 mol Hg ≈ 3.72 mol Hg
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 525 mL of a solution that has a concentration of Na ions of 1.10 M
Answers
Answer:
31.652g of Na3PO4
Explanation:
We'll begin by calculating the molarity of Na3PO4 solution. This can be achieved as shown below:
Na3PO4 will dessicate in solution as follow:
Na3PO4(aq) —> 3Na+(aq) + PO4³¯(aq)
From the balanced equation above,
1 mole of Na3PO4 produce 3 moles of sodium ion, Na+.
Therefore, xM Na3PO4 will produce 1.10M sodium ion, Na+ i.e
xM Na3PO4 = (1.10 x 1)/3
xM Na3PO4 = 0.367M
Therefore, the molarity of Na3PO4 is 0.367M.
Next, we shall determine the number of mole of Na3PO4 in the solution. This is illustrated below:
Molarity of Na3PO4 = 0.367M
Volume = 525mL = 525/1000 = 0.525L
Mole of Na3PO4 =..?
Molarity = mole /Volume
0.367 = mole /0.525
Cross multiply
Mole of Na3PO4 = 0.367 x 0.525
Mole of Na3PO4 = 0.193 mole.
Finally, we shall convert 0.193 mole of Na3PO4 to grams. This is illustrated below:
Molar mass of Na3PO4 = (23x3) + 31 + (16x4) = 164g/mol
Mole of Na3PO4 = 0.193 mole
Mass of Na3PO4 =.?
Mass = mole x molar mass
Mass of Na3PO4 = 0.193 x 164
Mass of Na3PO4 = 31.652g
Therefore, 31.652g of Na3PO4 is needed to prepare the solution.
Zinc nitrate can be produced by reacting an acid and a metal oxide.
Name the acid and the metal oxide used to produce zinc nitrate.
Answers
Answer:
The acid is Nitric Acid and the metal zinc
Explanation:
Use the chemical equation to answer the question. 2Ag(s) + H₂S(g) → Ag₂S(s) + H₂(g) The molar mass of silver (Ag) is 108 g/mol. The molar mass of sulfur (S) is 32 g/mol. The reaction uses 0.04 mol of silver. Which steps show how to determine the mass of silver sulfide (Ag₂S) produced in the reaction?
Answers
As per the given balanced reaction, 2 moles of silver gives 1 mole of the product silver sulfide. Hence, 0.04 moles will given 0.02 moles of silver sulfide.
What is theoretical yield of a reaction?The theoretical yield of a reaction is the amount of product obtained based on the balanced chemical equation of the reaction. However, the actual yield might vary from the the theoretical value.
The given reaction of Ag and H₂S shows that, two moles of Ag produce one mole of the product silver sulfide.
Number of moles of silver sulfide produce by 0.04 moles of Ag is then half of this number that is 0.02 moles of Ag₂S.
Therefore, 0.0 moles of Ag will give 0.02 moles of silver sulfide. Using the same way, we can determine the yield of products in any reaction.
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The powerful, warm, fast Atlantic Ocean current is called the
A.Atlantic Curren
B.Rip Tide
C.Gulf Stream
D.El Nino
60 points!
Answers
Answer:
C
Explanation:
Warm water is heated by the Gulf Stream, a warm air current that originates in the Gulf of Mexico. As the warm water moves north, it forces cooler water to sink and move south.
the reason of which I do not believe it is a Rip Tide is because rip tides have been found in both several rivers and oceans, if not all.
Thermal energy comes from the ______ energy of the atoms and molecules that make up the matter
Answers
Answer:
Thermal engery comes from heat engery
Thermal energy comes from the kinetic energy of the atoms and molecules that make up the matter.
What is molecule?The phrases molecule, compound, even atom might be difficult to understand! Here's a description of what a molecular is (and isn't) as well as some examples of typical molecules. Molecules are formed when a number of atoms create chemical bonds. It makes no difference whether the atoms are identical or different.
Compounds are molecules composed of two or even more elements. Water, calcium oxide, as well as glucose are examples of molecules that combine. Not that all molecules are compounds; not all compounds are molecules. Thermal energy comes from the kinetic energy of the atoms and molecules that make up the matter.
Therefore, thermal energy comes from the kinetic energy of the atoms and molecules that make up the matter.
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OMG plz help me out with this!!
What are 3 differences between animal cells and plant cells?
What do the cell wall and chloroplasts do for the plant cell?
What are 2 things that animal cells and plant cells have in common?
Thank you!
Answers
The chloroplasts allow plants to capture the energy of the sun in energy rich molecules. Cell walls allow plants to have rigid structures varied as wood trunks and supple leaves. And vacuoles allow plants to change size.
They both share common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
How many molecules are in 24 grams of ozone (03)
Answers
Answer:48
Explanation:
Answer: 3. 0.125 X 10”23 molecules
Explanation:
Compare the way that frogs breathe when they are tadpoles with the way frogs breathe when they are adults.
Answers
Answer:Frogs breathe through gills underwater to get oxygen and when frogs are adults they breathe through their lungs to get oxygen.
Explanation:
A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L How many mL of the medication should be given if a patient is prescribed 250 mg of the medication?
Answers
Ancef (Cefazolin) is a first-generation cephalosporin antibiotic that is used to treat bacterial infections. Cefazolin is available in several formulations, including injectable, intravenous, and powder for injection.
A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L. We need to determine how many milliliters of the medication should be given if a patient is prescribed 250 mg of the medication.To begin with, let us first calculate the concentration of the reconstituted solution using the given data.1 gram of Ancef (Cefazolin) = 1000 milligrams (mg)5 mL of normal saline = 5000 milligrams (mg)Therefore, the total volume of the reconstituted solution = 5 mL + the volume of Ancef (Cefazolin)1 g of Ancef (Cefazolin) = 125 mg/mL (Given)Therefore, the volume of Ancef (Cefazolin) = (250 mg)/(125 mg/mL) = 2 mLTherefore, the total volume of the reconstituted solution = 5 mL + 2 mL = 7 mLThus, the amount of medication that should be given to the patient is 2 mL.For such more question on antibiotic
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which variable is directly proportional to frequency?
velocity
wavelength
position
energy
Answers
Answer:
its letter D Energy I think
Explain how the
total number of
atoms are
different from
the total number
of elements in a
compound
Answers
helium gas diffuses 4 times as fast as an unknown gas. What is relative molecular mass of the gas
Answers
The relative molecular mass of the gas : 64 g/mol
Further explanationGiven
Helium rate = 4x an unknown gas
Required
The relative molecular mass of the gas
Solution
Graham's Law
\(\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }\)
r₁=4 x r₂
r₁ = Helium rate
r₂ = unknown gas rate
M₁= relative molecular mass of Helium = 4 g/mol
M₂ = relative molecular mass of the gas
Input the value :
\(\tt \dfrac{4r_2}{r_2}=\sqrt{\dfrac{M_2}{4} }\\\\16=\dfrac{M_2}{4}\\\\M_2=64~g/mol\)
What is the molarity of a solution containing 4.2 mol of NaCl and a volume of 2.3 L?
Answers
The molarity of a solution containing 4.2 mol of NaCl and a volume of 2.3 L is 1.9 M
The molarity is the number of moles of solute per litre of solution.
n=4.2
V=2.3 L
M=n/V
M=4.2/2.3
\(M=1.82\)
Molarity is ≅1.9 M
Molarity or molar concentration is the number of moles of solute per liter of solution.Molar concentration can be used to convert between the mass or moles of solute and the volume of the solution.Molarity is represented by M, which is termed as molar. One molar is the molarity of a solution where one gram of solute is dissolved in a liter of solution. Since the solvent and solute combine to create a solution in a solution, the total volume of the solution is measured.To learn more about molarity visit:
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When magnesium chloride is formed what question will the student need to ask prior to writing the formula?
A.
What are the oxidation numbers of each atom?
B.
What is the total number of electrons for each atom?
C.
What is the state of matter of each element in the formula?
D.
What period does magnesium belong to?
Answers
Prior to writing the chemical formula of magnesium chloride, a question which any student will need to ask is: A. What are the oxidation numbers of each atom?
A chemical formula can be defined as a scientific notation that is used to show (represent) the type and total number of atoms that constitute a particular chemical molecule or compound, by using the oxidation number, chemical symbols and subscripts.
Hence, a student would need to know the oxidation numbers of each atom when magnesium chloride is formed after a chemical reaction.
In Chemistry, an oxidation number represents the number of electrons gained or lost by an atom of a chemical element during a chemical reaction.
In conclusion, when magnesium chloride is formed, a question which the student will need to ask prior to writing the chemical formula is "what are the oxidation numbers of each atom?"
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Determine the empirical formula of an oxide of nitrogen containing 70% of oxygen. If the relative molecular mass of the oxide is 92. Deduce its molecular mass
Answers
The iron oxide has 69.9
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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Question 1
Given the equation: Q = mcAT
Q = heat (in Joules)
m = mass (in grams)
C = 4.18 (specific heat capacity)
AT change in temperature (°C)
How many Joules of heat energy are absorbed when 200 grams of water are heated from 20 C to 60 C.
Answers
The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.
To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.
This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.
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Calculate the morality of a 35.4% (by mass) aqueous solution of phosphoric acid (H3PO4). Molar mass of H3PO4 is 98.00g/mol
Answers
Answer:
no idea with the answer pls check with otherr
Convert 355 kJ to Cal
Answers
Answer =84.847
Which of the following is an incorrect representation for a neutral atom?
36Li
613C
3063Cu
1530P
Answers
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li
To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.
Let's analyze the given representations:
36Li:
This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.
613C:
This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.
3063Cu:
This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.
1530P:
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.
Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.
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Summarize a thunderstorm in 4 words:
Answers
Answer:
deafening, spine-chilling, treacherous, blasting.
Explanation:
I hope this helps!! Please mark me brainliest and have a great day!
Lewis Structure for NO3-
Answers
Answer::
Explanation::
Isooctane", a fuel used in gasoline engines because it has an antiknock octane rating of 100, has a density of 0.6919 g/cm3. How many pounds would 20.4 gallons of this fuel (a typical full tank) weigh?
Answers
20.4 gallons of Isooctane fuel is 117.7786 lb.
1 gallon = 3785 cm3 = 4 quart; 1 pound = 453.6 g.
So here. 20.4 gallons = 20.4 x 3785 cm³ = 77214 cm³ = 77214 ml
D = m/v ⇒ mass = density x volume
Given density is 0.6919 g/cm3
Mass = 0.6919 x 77214 = 53424.3666 g
1 g = 1/453.6 lb ⇒ 53424.3666 g =53424.3666 /453.6 lb = 117.7786 lb.
isooctane or iso-octane is also known as 2,2,4-Trimethylpentane,
being an important component of gasoline, it is used in relatively large proportions (around 10%) to increase the knock resistance of fuel.
An antiknock agent is a gasoline additive which is used to reduce engine knocking and also increases fuel's octane rating by raising the temperature and pressure at which auto-ignition occurs.
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In each pair of compounds, pick the one with the higher vapor pressure at a given temperature. Explain your reasoning.
a. CH4 or CH3CI
b. CH3CH2CH2OH or CH3OH
c. CH3OH or H2CO
Answers
Answer:
The answer is:
\(PART \ A: CH_4\\\\PART \ B: CH_30H\\\\PART \ C: H_2CO\)
Explanation:
Parts A:
The vapor pressure is higher in \(CH_4\) because it is non-polar, while \(CH_3Cl\) is polar. \(CH_4\) has a lower molar weight as well.
Part B:
Although hydrogen bonding is found in both commodities, the vapor pressure is higher because of the smaller molar mass of \(CH_30H\).
Part C:
\(H_2CO\) does not show hydrogen due to the increased vapor pressure
\(CH_3OH\) bonding.
species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. which pf the following best explains this difference
A: Bacteria reproduce more rapidly, allowing species to evolve more quickly
B:Bacterial populations are more isolated, permitting increases in genetic variability
C:certain bacteria grow more steadily over time, giving an evolutionary advantage over mammals
D: Individual bacteria have the same genes, providing opportunities for increased biodiversity in one population.
Answers
Answer:A
Explanation:
Species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. Bacteria reproduce more rapidly, allowing species to evolve more quickly best explains this difference. Therefore, option A is correct.
What allows bacteria to evolve so quickly ?Bacterial species evolve quickly because of their large populations, which provide numerous opportunities for mutations, and because they readily exchange genetic information, even between species. Some of this genetic diversity influences drug sensitivity or resistance, providing material for Darwinian selection.
Bacteria are among the world's fastest reproducing organisms, doubling every 4 to 20 minutes. Some pathogenic strains of E. coli grow quickly.
Bacterial populations evolve antibiotic resistance so quickly due to their fast generation times, large population sizes, and unique gene acquisition methods. These are some of the reasons bacteria have been so successful in evolution.
Thus, option A is correct.
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If a solution has a [H+] concentration of 4.5 x 10-7 M, is this an acidic or basic solution?
Solve and Explain.
Answers
Considering the definition of pH, the pH is 6.35 and the solution is acidic.
Definition of pHpH is the Hydrogen Potential and it is a measure of acidity or alkalinity. pH indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
Acidic or basic solution in this caseIn this case, being [H⁺]=4.5×10⁻⁷ M, you can replace this value in the definition of pH:
pH= -log (4.5×10⁻⁷ M)
Solving:
pH= 6.35
Finally, the pH is lower than 7, the solution is acidic.
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